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https://issues.apache.org/jira/browse/YARN-445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrey Klochkov reassigned YARN-445:
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Assignee: (was: Andrey Klochkov)
After I submitted the patch for this there were alternative proposals / patches
discussed, so I'm unassigning myself from this jira.
> Ability to signal containers
> ----------------------------
>
> Key: YARN-445
> URL: https://issues.apache.org/jira/browse/YARN-445
> Project: Hadoop YARN
> Issue Type: Task
> Components: nodemanager
> Reporter: Jason Lowe
> Labels: BB2015-05-TBR
> Attachments: MRJob.png, MRTasks.png, YARN-445--n2.patch,
> YARN-445--n3.patch, YARN-445--n4.patch,
> YARN-445-signal-container-via-rm.patch, YARN-445.patch, YARNContainers.png
>
>
> It would be nice if an ApplicationMaster could send signals to contaniers
> such as SIGQUIT, SIGUSR1, etc.
> For example, in order to replicate the jstack-on-task-timeout feature
> implemented by MAPREDUCE-1119 in Hadoop 0.21 the NodeManager needs an
> interface for sending SIGQUIT to a container. For that specific feature we
> could implement it as an additional field in the StopContainerRequest.
> However that would not address other potential features like the ability for
> an AM to trigger jstacks on arbitrary tasks *without* killing them. The
> latter feature would be a very useful debugging tool for users who do not
> have shell access to the nodes.
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